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A147731
Number of permutations of 0..n-1 with all sums of 2 through 2 adjacent terms squared respectively unique.
0
1, 2, 6, 24, 120, 624, 4560, 37440, 323520, 3167616, 34387248, 397398720, 5179836888, 69488212320, 1032953884956
OFFSET
1,2
CROSSREFS
Sequence in context: A147734 A147733 A147732 * A152337 A152338 A152348
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 11 2008
STATUS
approved